For performance reasons, whichever mechanism is used, the application should be coded to first check if a given level of logging is enabled before constructing the actual log messages.
出于性能原因，无论使用哪种机制，在构建实际日志消息之前，应对应用程序进行编码，首先检查是否启用给定的日志记录级别。
This paper reviewed the advancement of gene silencing mechanism, silencing suppressors coded by virus, and the application of gene silencing in plant anti-virus engineering.
本文对基因沉默的过程、病毒编码的抑制子蛋白及基因沉默在植物抗病毒工程的研究进展进行简要综述。
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